She was accompanied by her younger brother.

她由她的弟弟陪着。

《柯林斯英汉双解大词典》

In one episode, they read a letter written by the famous writer Xiao Hong to her younger brother in 1941.

在一集中，他们读了著名作家萧红于1941年写给她弟弟的一封信。

youdao

Her younger brother is a doctor.

她弟弟是一名医生。

youdao

Muller's father managed to buy her freedom and that of her younger brother.

VOA: standard.2010.04.10

You remember they're wandering around the forest without her picking berries. The younger brother, - the second brother, is most concerned about his sister's safety -- so I want you to look at this passage.

你们记得他们在树林中游荡,没有拿他们采摘的果子，小哥哥，也就是二哥哥，是最关心他妹妹安全的-,所以我想让你们看这篇文章。

耶鲁公开课 - 弥尔顿课程节选

Rose said they tried to recruit her younger brother and nephew for a karate class.

NPR: U.S. Arrests 7 Accused of Chicago Bomb Plot

She didn't speak of herself, but she spoke of her younger brother and sister.

WHITEHOUSE: The First Lady Announces New Funding for Military Families

And overnight, she went from being a 15-year-old teenager to a mom for her younger brother and sister.

WHITEHOUSE: The First Lady Announces New Funding for Military Families